2534. In general, very little medicine is needed in this disease of the thrush—an alterative powder, or a little magnesia, given once or twice, being all, with the warm bath, that, in the great majority of cases, is needed to restore the mucous membrane to health. As thrush is caused by an excess of heat, or over-action in the lining membrane of the stomach and bowels, whatever will counteract this state, by throwing the heat on the surface, must materially benefit, if not cure, the disease: and that means every mother has at hand, in the form of a warm bath. After the application of this, a little magnesia to correct the acidity existing along the surface of the mucous membrane, is often all that is needed to throw the system into such a state as will effect its own cure. This favourable state is indicated by an excessive flow of saliva, or what is called "dribbling," and by a considerable amount of relaxation of the bowels-a condition that must not be mistaken for diarrhoea, and checked as if a disease, but rather, for the day or two it continues, encouraged as a critical evacuant.
2535. Should there be much debility in the convalescence, half a teaspoonful of stee wine, given twice a day in a little barley-water, will be found sufficient for all the purposes of a tonic. This, with the precaution of changing the child's food, or, when it lives on the mother, of correcting the quality of the milk by changing her own diet, and, by means of an antacid or aperient, improving the state of the secretion. Such is all the treatment that this disease in general requires.
2536. The class of diseases we are now approaching are the most important, both in their pathological features and in their consequences on the constitution, of any group or individual disease that assails the human body; and though more frequently attacking the undeveloped frame of childhood, are yet by no means confined to that period. These are called Eruptive Fevers, and embrace chicken-pox, cow-pox, small-pox, scarlet fever, measles, milary fever, and erysipelas, or St. Anthony's fire.
2537. The general character of all these is, that they are contagious, and, as a general rule, attack a person only once in his lifetime; that their chain of diseased actions always begins with fever, and that, after an interval of from one to four days, the fever is followed by an eruption of the skin.
CHICKEN-POX, OR GLASS-POX; AND COW-POX, OR VACCINATION.
2538. CHICKEN-POX, or GLASS-POX, may, in strict propriety, be classed as a mild variety of small-pox, presenting all the mitigated symptoms of that formidable disease. Among many physicians it is, indeed, classed as small-pox, and not a separate disease; but as this is not the place to discuss such questions, and as we profess to give only facts, the result of our own practical experience, we shall treat this affection of glass-pox or chicken-pox, as we ourselves have found it, as a distinct and separate disease.
2539. Chicken-pox is marked by all the febrile symptoms presented by small-pox, with this difference, that, in the case of chicken-pox, each symptom is particularly slight. The heat of body is much less acute, and the principal symptoms are difficulty of breathing, headache, coated tongue, and nausea, which sometimes amounts to vomiting. After a term of general irritability, heat, and restlessness, about the fourth day, or between the third and fourth, an eruption makes its appearance over the face, neck, and body, in its first two stages closely resembling small-pox, with this especial difference, that whereas the pustules in small-pox have flat and depressed centres—an infallible characteristic of small-pox—the pustules in chicken-pox remain globular, while the fluid in them changes from a transparent white to a straw-coloured liquid, which begins to exude and disappear about the eighth or ninth day, and, in mild cases, by the twelfth desquamates, or peels off entirely.
2540. There can be no doubt that chicken-pox, like small-pox, is contagious, and under certain states of the atmosphere becomes endemic. Parents should, therefore, avoid exposing young children to the danger of infection by taking them where it is known to exist, as chicken-pox, in weakly constitutions, or in very young children, may superinduce small-pox, the one disease either running concurrently with the other, or discovering itself as the other declines. This, of course, is a condition that renders the case very hazardous, as the child has to struggle against two diseases at once, or before it has recruited strength from the attack of the first.
2541. Treatment.—In all ordinary cases of chicken-pox—and it is very seldom it assumes any complexity—the whole treatment resolves itself into the use of the warm bath, and a course of gentle aperients. The bath should be used when the oppression of the lungs renders the breathing difficult, or the heat and dryness of the skin, with the undeveloped rash beneath the surface, shows the necessity for its use.
2542. As the pustules in chicken-pox very rarely run to the state of suppuration, as in the other disease, there is no fear of pitting or disfigurement, except in very severe forms, which, however, happen so seldom as not to merit apprehension. When the eruption subsides, however, the face may be washed with elder-flower water, and the routine followed which is prescribed in the convalescent state of small-pox.